Tecfluid LD61R User Manual

LD61R

Level switch

Instructions manual

R-MI-LD61R Rev.: 1 english version

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TABLE OF CONTENTS

1. INTRODUCTION .................................................................................... 4

2. RECEPTION ........................................................................................... 4

3. INSTALLATION ...................................................................................... 4

4. ELECTRICAL CONNECTION ................................................................ 5

4.1. Power supply connection ......................................................... 6

4.2. Relay output connection ........................................................... 6

5. OPERATION ........................................................................................... 7

6. MAINTENANCE ...................................................................................... 7

6.1. Cleaning …………………………..……………………………........ 7

6.2. Fuse ……....…...…………………..……………………………........ 7

7. TECHNICAL CHARACTERISTICS ........................................................ 8

7.1. Materials ..................................................................................... 8

7.2 Process connection ........................................................................ 8

7.3 Power supply .............................................................................. 8

7.4 Relay characteristics ................................................................. 8

7.5 General characteristics ............................................................. 8

8. DIMENSIONS …………………................................................................ 9

9. TROUBLESHOOTING ……..................................................................... 11

1. INTRODUCTION

The LD61R level switch is based on the variation of the natural resonant frequency of a
vibrating fork, when it is wetted by a liquid.

This variation is detected by the internal electronics and is used to determine the state of
the output .

2. RECEPTION

The LD61R level switches are supplied ready for installation and operation.

They are supplied packaged for their protection during storage and haulage.

To handle the detectors, they should always be held by the head, never by the vibrating
fork.

The vibrating fork should not be modified or bent, as this can damage the detector beyond
repair.

3. INSTALLATION

The LD61R level switch can be
mounted in any position. The more
usual insertion points are shown in the
figure 1.

In positions 1 the LD61R acts as a
maximum level switch. In positions 2
the LD61R acts as a minimum level
switch and in position 3 it acts as an
empty pipe detector (for example, to
protect a pump).

If the LD61R is installed in a horizontal
position it is recommended to install it
with the tines vertical to avoid
accumulation of substances, especially
in the case of high viscosity liquids.

To indicate the position of the tines the
LD-61 has a round mark on two of the
flats of the nut. These marks should be
in a vertical position when the detector
is installed in a horizontal position.

Punto de

Positioning mark

posicionamiento

Figure 1

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